18906030 has 144 divisors (see below), whose sum is σ = 58580496. Its totient is φ = 4193280.

The previous prime is 18905963. The next prime is 18906031. The reversal of 18906030 is 3060981.

It is a junction number, because it is equal to n+sod(n) for n = 18905985 and 18906003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18906031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 167254 + ... + 167366.

It is an arithmetic number, because the mean of its divisors is an integer number (406809).

Almost surely, 2^18906030 is an apocalyptic number.

18906030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18906030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29290248).

18906030 is an abundant number, since it is smaller than the sum of its proper divisors (39674466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18906030 is a wasteful number, since it uses less digits than its factorization.

18906030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 18906030 is about 4348.1064844366. The cubic root of 18906030 is about 266.3995258764.

The spelling of 18906030 in words is "eighteen million, nine hundred six thousand, thirty".